# PH System vs TUNAGチャット

The clearest difference is update cadence: TUNAGチャット at every 3 weeks against PH System's every 15 months. PH System's advantage is iOS requirement (13 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PH System ships an update every 15 months, TUNAGチャット every 3 weeks. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PH System | TUNAGチャット |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 25 MB | 86 MB |
| Requires iOS | **13** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [barnet Inc.](https://appshunter.io/developer/1203142034) | [stmn, inc.](https://appshunter.io/developer/1282324270) |

## What reviewers say

### PH System

[App page](https://appshunter.io/ios/app/ph-system/id1438705034)

**Features:** macOS Compatibility

**In-app purchases:** none


### TUNAGチャット

[App page](https://appshunter.io/ios/app/tunag/id6670598681)

This app facilitates seamless information sharing among colleagues and group members, separating work and personal communications. It offers channels, direct messages, voice and video calls with screen sharing, and file sharing capabilities.

**Highlights:** Public and private channels, Direct messaging, Voice and screen sharing calls, Group calls, File sharing (photos, videos, PDFs), Push notifications

**In-app purchases:** none


## Frequently asked questions

### Is PH System free?

PH System is free to download, with no in-app purchases.

### Is TUNAGチャット free?

TUNAGチャット is free to download, with no in-app purchases.

### Do PH System or TUNAGチャット have ads?

Neither PH System nor TUNAGチャット shows ads.

### Which is updated more often, PH System or TUNAGチャット?

PH System ships an update every 15 months, and TUNAGチャット every 3 weeks. Most recently, PH System was updated on October 25, 2026 and TUNAGチャット on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*